Based on all the "how much should I offer" or "is this a good deal" posts on this site it seems like a lot of people are either scared or have no clue how to negotiate.

Yup, a lot of people have no idea how to negotiate pricing. If someone is asking 52 i'm positive you can get it down to 49 easily. Just come up with a reasonable number in your head and walk if the seller doesn't come down to it.

And hell it never hurts to ask so just give them a low ball number. The worst that can happen is they say no and that's the end of it